1：游標的使用：
sql server游標的使用***
declare @date2 datetime
declare tabb_cursor cursor for
select date,weeknum,studytime from @tabb where date > @date order by date
open tabb_cursor
fetch next from tabb_cursor into @date2,@weeknumb,@studytimeb
while @@fetch_status = 0
begin
if @weeknumb !=7
insert into @tabc values (@weeknum,@date2,@sequence,@courseid,@chapterid,@studytime)
else if @weeknumb=7
begin
set @weeknum=@weeknum+1
endfetch next from tabb_cursor into @date2,@weeknumb,@studytimeb
endclose tabb_cursor
deallocate tabb_cursor
2：使用表變數：
use [db]
go/****** object: storedprocedure [dbo].[p_teacherstatis] script date: 11/26/2014 09:07:01 ******/
set ansi_nulls on
goset quoted_identifier on
goalter proc [dbo].[p_teacherstatis]
asdeclare @teacheridset table (teacherid int,status int)
declare @teanum int,
@v_teacherid varchar(max),
@v_adviserclassnum int,
@v_advisermembertotal int,
@v_adminclassnum int,
@v_adminmembertotal int,
@errorcode int
set @errorcode=0
--開啟事物
begin
set nocount on;
set xact_abort on;
begin try
begin transaction
-- 直接清空表
truncate table advc_teacher_statis
--建立 所有的老師的teacherid 集合
insert into @teacheridset (teacherid,status) select teacherid,1 from advc_teacher with (nolock) where status=1
select @teanum=count(*) from @teacheridset where status=1
while @teanum>0
begin
select top 1 @v_teacherid=teacherid from @teacheridset where status=1
-- 這個老師是班主任 管理的班級,管理的班級個數
select @v_adviserclassnum = count(case when act.teachertype =1 then 1 end),@v_adminclassnum = count(*)
from advc_class_teacher act with (nolock)
inner join advc_class ac with (nolock) on ac.classid = act.classid
where ac.status=1 and act.teacherid = @v_teacherid
-- 作為班主任 管理學員總數
select @v_advisermembertotal = sum(case when ct.teachertype = 1 then c.currcount else 0 end)
,@v_adminmembertotal = sum(c.currcount)
from advc_class c with(nolock)
inner join advc_class_teacher ct with (nolock) on ct.classid = c.classid
inner join advc_teacher tea with (nolock) on ct.teacherid = tea.teacherid
where c.status=1 and ct.teacherid = @v_teacherid
-- 直接清空了，下面就直接插入
insert into [advc_teacher_statis]
([teacherid],[adviserclassnum],[advisermembertotal],[adminclassnum],[adminmembertotal])
values
(@v_teacherid,@v_adviserclassnum,@v_advisermembertotal,@v_adminclassnum,@v_adminmembertotal)
update @teacheridset set status = 0 where teacherid=@v_teacherid
select @teanum=count(*) from @teacheridset where status=1
end--結束事物
commit transaction
end try
begin catch
rollback transaction
set @errorcode=-1 --失敗
end catch
end--print convert(varchar(20),@errorcode)
return @errorcode
SQLServer 儲存過程中各種判斷是否為空
1.判斷是否存在這樣的記錄 if not exists 和 if exists 相對應 例 使用者是否存在 if not exists if exists select 1 from user nolock where username abcd begin print 使用者存在 end else...
SqlServer儲存過程中迴圈的使用
1.while迴圈 格式示例如下 declare iint set i 1 while i 30begin insert into test userid values i set i i 1end2.游標迴圈 格式示例如下 declare a1varchar 10 a2varchar 10 a3i...
SQL SERVER儲存過程中使用事務
儲存過程格式 create procedure yourprocedure asbegin set nocount on begin try 開始捕捉異常 bein tran 開始事務 update a set a.names b.names from t1 as a inner join t2 a...